Hardness of Solid Substances - GrindingA number of metals and nonmetals are ground with a mortar and pestle. The nonmetals shown here are all soft (due to weak intermolecular forces), but the metals vary in hardness.

Covalent Bonding |

Nonmetals |

Physical Properties |

Solids |

Metallic Bonding |

Metals

Assessment Questions: First 3 results

Bonding : ImpossibleStructure (10 Variations)
Which of the following formulas represent substances that are likely to be stable at ordinary temperature and pressure? A good way to decide is to ask for which of the formulas is it possible to draw a reasonable Lewis structure (one that obeys the usual rules for drawing Lewis structures)?

A New "Bottom-Up" Framework for Teaching Chemical BondingTami Levy Nahum, Rachel Mamlok-Naaman, Avi Hofstein, and Leeor KronikThis article presents a general framework for bonding that can be presented at different levels of sophistication depending on the student's level and needs. The pedagogical strategy for teaching this model is a "bottom-up" one, starting with basic principles and ending with specific properties.Levy Nahum, Tami; Mamlok-Naaman, Rachel; Hofstein, Avi; Kronik, Leeor. J. Chem. Educ.2008, 85, 1680.

More on ClO and Related RadicalsWilliam B. JensenThe novel Lewis structure for the ClO radical and other related 13e isoelectronic species presented by Hirsch and Kobrak is identical to that proposed by Linnett over 40 years ago for the same species on the basis of his well-known double-quartet approach to Lewis structures.Jensen, William B. J. Chem. Educ.2008, 85, 783.